Two years ago, when she started working at the deli counter of a Walmart in Illinois, Lisa hoped that her job would amount to the beginning of a career, one that would pay enough to cover her bills and enable her to stay current on her student loan debt.

But despite one raise since, Lisa, who asked that only her first name be used, now earns just $9.10 an hour, or about $13,000 a year on part-time hours. Seven months pregnant, she recently filed for bankruptcy. With no alternatives at hand, Walmart now seems like a dead-end to poverty, she says.

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The company website declares that "a job at Walmart opens the door to a better life" and "the chance to grow and build a career." But interviews with 31 hourly workers and one former store manager reveal lives beset by paychecks too small to handle the bills, difficult to manage part-time schedules with hours subject to constant change, and little reason to hope for career advancement. Citing fear of losing their jobs, most spoke on the condition of anonymity.

The testimonials of these workers are confirmed by Walmart’s official compensation policy, an internal company document obtained by The Huffington Post, titled the "Field Non-Exempt Associate Pay Plan Fiscal Year 2013." The plan details a rigid pay structure for hourly employees that makes it difficult for most to rise much beyond poverty-level wages.